Masiku ano C, N, B ndi zina zosagwirizana ndi oxide zapamwamba zopangira zopangira, mlengalenga kuthamanga sintered pakachitsulo carbide ndi yaikulu, chuma, tinganene kuti emery kapena refractory mchenga. Silicon carbide yoyera ndi kristalo wopanda mtundu wowonekera. Ndiye kapangidwe kazinthu ndi mawonekedwe a silicon carbide ndi chiyani?
Sintered silicon carbide pansi pa mphamvu ya mumlengalenga
Kapangidwe kazinthu zam'mlengalenga kuthamanga kwa sintered silicon carbide:
Mphamvu ya mumlengalenga sintered silicon carbide yomwe imagwiritsidwa ntchito m'makampani ndi yopepuka yachikasu, yobiriwira, yabuluu ndi yakuda malinga ndi mtundu ndi zomwe zili zonyansa, ndipo chiyero ndi chosiyana komanso kuwonekera ndi kosiyana. Mapangidwe a silicon carbide crystal agawika m'mawu asanu ndi limodzi kapena owoneka ngati diamondi plutonium ndi cubic plutonium-sic. Plutonium-sic imapanga mapindikidwe osiyanasiyana chifukwa chamitundu yosiyanasiyana ya maatomu a kaboni ndi silicon mu kapangidwe ka kristalo, ndipo mitundu yopitilira 70 ya mapindikidwe apezeka. beta-SIC imatembenuzidwa ku alpha-SIC pamwamba pa 2100. Njira ya mafakitale ya silicon carbide imayeretsedwa ndi mchenga wa quartz wapamwamba kwambiri ndi petroleum coke mu ng'anjo yotsutsa. Mipiringidzo yoyengedwa ya silicon carbide imaphwanyidwa, kutsukidwa kwa acid-base, kupatukana kwa maginito, kuyang'ana kapena kusankha madzi kuti apange mitundu yosiyanasiyana ya tinthu tating'onoting'ono.
Makhalidwe azinthu zakupanikizika kwamlengalenga sintered silicon carbide:
Silicon carbide imakhala ndi kukhazikika kwamankhwala abwino, kukhathamiritsa kwamafuta, kuchuluka kwamafuta, kukana kuvala, kotero kuphatikiza pakugwiritsa ntchito abrasive, pali ntchito zambiri: njira yapadera, yomwe ingapangitse kukana kuvala ndikuwonjezera moyo wa 1 mpaka 2 nthawi. Zopangidwa ndi kutentha kosasunthika, kukula kochepa, kulemera kochepa, mphamvu yapamwamba ya zipangizo zotsutsa kwambiri, mphamvu zamagetsi ndi zabwino kwambiri. Low-grade silicon carbide (kuphatikiza pafupifupi 85% SiC) ndi deoxidizer yabwino kwambiri powonjezera liwiro la kupanga zitsulo ndikuwongolera mosavuta kapangidwe ka mankhwala kuti zitsulo zizikhala bwino. Kuphatikiza apo, mpweya wothamanga wa sintered silicon carbide umagwiritsidwanso ntchito kwambiri popanga magawo amagetsi a silicon carbon ndodo.
Silicon carbide ndi yovuta kwambiri. Morse hardness ndi 9.5, wachiwiri kwa diamondi yolimba kwambiri padziko lapansi (10), ndi semiconductor yokhala ndi matenthedwe abwino kwambiri, imatha kukana makutidwe ndi okosijeni pakatentha kwambiri. Silicon carbide ili ndi mitundu yosachepera 70 ya crystalline. Plutonium-silicon carbide ndi isomero wamba yomwe imapanga kutentha pamwamba pa 2000 ndipo imakhala ndi hexagonal crystalline structure (yofanana ndi wurtzite). Sintered silicon carbide pansi pa mphamvu ya mumlengalenga
Kugwiritsa ntchito silicon carbide mumakampani a semiconductor
Silicon carbide semiconductor industry chain makamaka imaphatikizapo silicon carbide high-purity powder, single crystal substrate, epitaxial sheet, zigawo za mphamvu, ma phukusi a module ndi ma terminal applications.
1. Single crystal substrate Single crystal substrate ndi semiconductor yothandizira zinthu, conductive chuma ndi epitaxial kukula gawo lapansi. Pakalipano, njira za kukula kwa SiC single crystal zikuphatikizapo njira yosinthira nthunzi (njira ya PVT), njira yamadzimadzi (njira ya LPE), ndi njira yotentha kwambiri ya mankhwala opangira mpweya (HTCVD njira). Sintered silicon carbide pansi pa mphamvu ya mumlengalenga
2. Epitaxial sheet Silicon carbide epitaxial sheet, silicon carbide sheet, single crystal film (epitaxial layer) yomwe ili ndi njira yofanana ndi kristalo ya gawo lapansi yomwe ili ndi zofunikira zina za silicon carbide substrate. Muzochita zogwiritsidwa ntchito, zida zamagulu amtundu wa band gap semiconductor pafupifupi zonse zimapangidwa mu epitaxial wosanjikiza, ndipo silicon chip yokha imagwiritsidwa ntchito ngati gawo lapansi, kuphatikiza gawo lapansi la GaN epitaxial layer.
3. Kuyeretsa kwapamwamba kwa silicon carbide powder High-purity silicon carbide powder ndizopangira kukula kwa silicon carbide single crystal ndi njira ya PVT, ndipo chiyero cha mankhwalawa chimakhudza mwachindunji kukula kwa khalidwe ndi makhalidwe a magetsi a silicon carbide single crystal.
4. Chipangizo chamagetsi ndi mphamvu yamagulu ambiri opangidwa ndi silicon carbide, yomwe ili ndi zizindikiro za kutentha kwapamwamba, maulendo apamwamba komanso kuchita bwino kwambiri. Malinga ndi mawonekedwe a chipangizocho, chipangizo chamagetsi cha SiC chimaphatikizapo diode yamagetsi ndi chubu chosinthira mphamvu.
5. Terminal Mu ntchito za semiconductor za m'badwo wachitatu, ma semiconductor a silicon carbide ali ndi mwayi wokhala wothandizirana ndi gallium nitride semiconductors. Chifukwa cha kutembenuka kwakukulu, mawonekedwe otsika otentha, opepuka ndi maubwino ena a zida za SiC, kufunikira kwamakampani akumunsi akukulirakulira, ndipo pali chizolowezi cholowa m'malo mwa zida za SiO2.
Nthawi yotumiza: Jun-16-2023